ASN database

You may find these sub-pages interesting as well:

Related tools

DNS lookup / nslookup / DIG of DNS records. An online tool for DNS lookups. By default recursive lookups querying the authoritative name servers. Lookups on specific DNS resolvers are also possible. Additionally, it will look up secondary records and output a full log of what was done on a technical level.

WHOIS / RDAP lookup

IP to CIDR calculation tool with subnet info. The reverse, CIDR ranges to IP addresses, is also possible. Last but not least, it includes a tool for refactoring groups of IPs, domain names, and/or other CIDR ranges.

What is my IPv4 and IPv6?

Check your own IP - both IPv4 and IPv6. Works as a connectivity test as well.

GeoIP location

203.181.192.0

World map, day/night + local time

beta

Beautiful day/night map of the world, with markup of all major cities including local date and time.

Result

203.181.192.0/18

Prefix:

203.181.192.0/18 (16.384 IP's - view in CIDR to IP tool)

Description:

Japan Network Information Center

Country:

Japan

Announced by:

for assignment to JPNIC members
https://www.sinet.ad.jp/

AS2907, 138 peers, 528 announced prefixes

See all details on AS2907 - for assignment to JPNIC members »

Matching prefixes

Country

ASN

Announced prefix

Description

Size

Japan

AS2907

203.181.192.0/18

Japan Network Information Center

16.384

Japan

AS7660

203.181.194.0/23

Japan Network Information Center

512

Japan

AS7660

203.181.248.0/23

Japan Network Information Center

512

Log

000	+000	Parse input (Prefix)
000	+000	Search database for '203.181.192.0/18'
013	+012	3 prefixes found
013	+000	Done

ASN database

Related tools

Result

203.181.192.0/18

Matching prefixes

Log

The tools of iamroot.tech

Changelog

Newsletter